Helical heating element for an injection moulding device

Details Helical heating element for an injection moulding device Helical heating element for an injection moulding device

2005-05-17

2005-05-17

Heitbrink, Tim (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With means to heat or cool

C264S328150

Reexamination Certificate

active

06893248

ABSTRACT:
An injection moulding device includes an elongated nozzle having a central bore, a forward end with an outlet for supplying molten thermoplastic material via the bore and the outlet to a cavity, and a heating element around the nozzle, the heating element having a rear end and a forward end and being helically wound around and supported by the nozzle. The helical windings of the heating element are substantially unrestrained in a circumferential direction of the nozzle, wherein one of the ends of the heating element can be radically displaced around the nozzle in a circumferential direction.

REFERENCES:
patent: 4730937 (1988-03-01), Hehl
patent: 5360333 (1994-11-01), Schmidt
patent: 297 18 789 (1997-12-01), None
patent: 0 444 748 (1991-09-01), None
patent: 2 620 953 (1989-03-01), None

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